[PATCH 7/7] wifi: mt76: mt792x: build iface combinations dynamically for optional NAN
Sean Wang
sean.wang at kernel.org
Wed Mar 4 15:50:20 PST 2026
From: Sean Wang <sean.wang at mediatek.com>
Expose NAN capability only when supported by firmware. Split chanctx
interface combinations into base and NAN sets and dynamically append NAN
combinations when available.
Co-developed-by: Stella Liu <yu-ching.liu at mediatek.com>
Signed-off-by: Stella Liu <yu-ching.liu at mediatek.com>
Signed-off-by: Sean Wang <sean.wang at mediatek.com>
---
drivers/net/wireless/mediatek/mt76/mt792x.h | 4 +
.../net/wireless/mediatek/mt76/mt792x_core.c | 113 ++++++++++++++++--
2 files changed, 109 insertions(+), 8 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt792x.h b/drivers/net/wireless/mediatek/mt76/mt792x.h
index d3988e5b38c0..57c9a0437c5e 100644
--- a/drivers/net/wireless/mediatek/mt76/mt792x.h
+++ b/drivers/net/wireless/mediatek/mt76/mt792x.h
@@ -23,6 +23,7 @@
#define MT792x_CFEND_RATE_11B 0x03 /* 11B LP, 11M */
#define MT792x_FW_TAG_FEATURE 4
+#define MT792x_FW_CAP_NAN BIT(5)
#define MT792x_FW_CAP_CNM BIT(7)
#define MT792x_CHIP_CAP_CLC_EVT_EN BIT(0)
@@ -263,6 +264,9 @@ struct mt792x_dev {
struct ieee80211_chanctx_conf *new_ctx;
struct ieee80211_vif *nan_vif;
+
+ const struct ieee80211_iface_combination *iface_combinations;
+ int n_iface_combinations;
};
static inline struct mt792x_bss_conf *
diff --git a/drivers/net/wireless/mediatek/mt76/mt792x_core.c b/drivers/net/wireless/mediatek/mt76/mt792x_core.c
index f12cbfb35f9b..e0850998cb4e 100644
--- a/drivers/net/wireless/mediatek/mt76/mt792x_core.c
+++ b/drivers/net/wireless/mediatek/mt76/mt792x_core.c
@@ -3,6 +3,7 @@
#include <linux/module.h>
#include <linux/firmware.h>
+#include <linux/slab.h>
#include "mt792x.h"
#include "dma.h"
@@ -60,7 +61,33 @@ static const struct ieee80211_iface_limit if_limits_chanctx_scc[] = {
}
};
-static const struct ieee80211_iface_combination if_comb_chanctx[] = {
+static const struct ieee80211_iface_limit if_limits_nan_mcc[] = {
+ {
+ .max = 2,
+ .types = BIT(NL80211_IFTYPE_STATION),
+ },
+ {
+ .max = 1,
+ .types = BIT(NL80211_IFTYPE_NAN),
+ },
+};
+
+static const struct ieee80211_iface_limit if_limits_nan_scc[] = {
+ {
+ .max = 2,
+ .types = BIT(NL80211_IFTYPE_STATION),
+ },
+ {
+ .max = 1,
+ .types = BIT(NL80211_IFTYPE_NAN),
+ },
+ {
+ .max = 1,
+ .types = BIT(NL80211_IFTYPE_AP),
+ },
+};
+
+static const struct ieee80211_iface_combination if_comb_chanctx_base[] = {
{
.limits = if_limits_chanctx_mcc,
.n_limits = ARRAY_SIZE(if_limits_chanctx_mcc),
@@ -77,6 +104,60 @@ static const struct ieee80211_iface_combination if_comb_chanctx[] = {
}
};
+static const struct ieee80211_iface_combination if_comb_chanctx_nan[] = {
+ {
+ .limits = if_limits_nan_mcc,
+ .n_limits = ARRAY_SIZE(if_limits_nan_mcc),
+ .max_interfaces = 3,
+ .num_different_channels = 2,
+ .beacon_int_infra_match = false,
+ },
+ {
+ .limits = if_limits_nan_scc,
+ .n_limits = ARRAY_SIZE(if_limits_nan_scc),
+ .max_interfaces = 4,
+ .num_different_channels = 1,
+ .beacon_int_infra_match = false,
+ },
+};
+
+static int mt792x_setup_iface_combinations(struct mt792x_dev *dev,
+ struct wiphy *wiphy)
+{
+ const bool cnm = !!(dev->fw_features & MT792x_FW_CAP_CNM);
+ const bool nan = !!(dev->fw_features & MT792x_FW_CAP_NAN);
+ const int n_base = ARRAY_SIZE(if_comb_chanctx_base);
+ const int n_nan = ARRAY_SIZE(if_comb_chanctx_nan);
+ struct ieee80211_iface_combination *comb;
+
+ if (!cnm) {
+ dev->iface_combinations = if_comb;
+ dev->n_iface_combinations = ARRAY_SIZE(if_comb);
+ return 0;
+ }
+
+ /* CNM enabled, NAN optional */
+ if (!nan) {
+ dev->iface_combinations = if_comb_chanctx_base;
+ dev->n_iface_combinations = ARRAY_SIZE(if_comb_chanctx_base);
+ return 0;
+ }
+
+ /* CNM + NAN: dynamically build base + nan list */
+ comb = devm_kcalloc(&wiphy->dev, n_base + n_nan, sizeof(*comb),
+ GFP_KERNEL);
+ if (!comb)
+ return -ENOMEM;
+
+ memcpy(comb, if_comb_chanctx_base, sizeof(if_comb_chanctx_base));
+ memcpy(comb + n_base, if_comb_chanctx_nan, sizeof(if_comb_chanctx_nan));
+
+ dev->iface_combinations = comb;
+ dev->n_iface_combinations = n_base + n_nan;
+
+ return 0;
+}
+
void mt792x_tx(struct ieee80211_hw *hw, struct ieee80211_tx_control *control,
struct sk_buff *skb)
{
@@ -621,6 +702,7 @@ int mt792x_init_wiphy(struct ieee80211_hw *hw)
struct mt792x_phy *phy = mt792x_hw_phy(hw);
struct mt792x_dev *dev = phy->dev;
struct wiphy *wiphy = hw->wiphy;
+ int err;
hw->queues = 4;
if (dev->has_eht) {
@@ -641,15 +723,17 @@ int mt792x_init_wiphy(struct ieee80211_hw *hw)
hw->vif_data_size = sizeof(struct mt792x_vif);
hw->chanctx_data_size = sizeof(struct mt792x_chanctx);
- if (dev->fw_features & MT792x_FW_CAP_CNM) {
+ if (dev->fw_features & MT792x_FW_CAP_CNM)
wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
- wiphy->iface_combinations = if_comb_chanctx;
- wiphy->n_iface_combinations = ARRAY_SIZE(if_comb_chanctx);
- } else {
+ else
wiphy->flags &= ~WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
- wiphy->iface_combinations = if_comb;
- wiphy->n_iface_combinations = ARRAY_SIZE(if_comb);
- }
+
+ err = mt792x_setup_iface_combinations(dev, wiphy);
+ if (err)
+ return err;
+
+ wiphy->iface_combinations = dev->iface_combinations;
+ wiphy->n_iface_combinations = dev->n_iface_combinations;
wiphy->flags &= ~(WIPHY_FLAG_IBSS_RSN | WIPHY_FLAG_4ADDR_AP |
WIPHY_FLAG_4ADDR_STATION);
wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
@@ -657,6 +741,19 @@ int mt792x_init_wiphy(struct ieee80211_hw *hw)
BIT(NL80211_IFTYPE_P2P_CLIENT) |
BIT(NL80211_IFTYPE_P2P_GO) |
BIT(NL80211_IFTYPE_P2P_DEVICE);
+ if ((dev->fw_features & MT792x_FW_CAP_CNM) &&
+ (dev->fw_features & MT792x_FW_CAP_NAN)) {
+ wiphy->interface_modes |= BIT(NL80211_IFTYPE_NAN);
+ wiphy->nan_supported_bands = BIT(NL80211_BAND_2GHZ);
+ wiphy->nan_capa.flags = WIPHY_NAN_FLAGS_CONFIGURABLE_SYNC |
+ WIPHY_NAN_FLAGS_USERSPACE_DE;
+ wiphy->nan_capa.op_mode = NAN_OP_MODE_PHY_MODE_MASK;
+ wiphy->nan_capa.n_antennas = 0x22;
+ wiphy->nan_capa.max_channel_switch_time = 12;
+ wiphy->nan_capa.dev_capabilities = NAN_DEV_CAPA_EXT_KEY_ID_SUPPORTED |
+ NAN_DEV_CAPA_NDPE_SUPPORTED;
+ }
+
wiphy->max_remain_on_channel_duration = 5000;
wiphy->max_scan_ie_len = MT76_CONNAC_SCAN_IE_LEN;
wiphy->max_scan_ssids = 4;
--
2.43.0
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